Dust-separating blower.



No. 845,044. PATENTED FEB. 26, 1907. W. J. BALDWIN. DUST SEPARATING BLOWER.

APPLICATION FILED JUNE 3,1903.

UNITED srA'rEs PATENT or rron.

WILLIAM J, BALDWIN, OF NEW YORK, N. \Y.

DUST-SEPARATING BLOWER.

Specification of Letters Patent.

Patented Feb. 26., 1907.

' Applicationfiled-Tune3,1903. SerialNo.159.918.

, the following is a specification.

This invention relates to improvements in dust-sep aratin blowers.

It is especia ly the purpose of this invention to provide a blower for ventilation and other urposeswhereby much of the larger partic es and those which are the most'objectionable on sanitary rounds will be separated from the air -witiout the use ofthe large, ponderous, and fra ile filteringescreens now generally employe to filter the air. Such screens are not only of great size, inconvenient, and expensive in themselves, butrequire the use of large rooms or passages inbuildings to set them in, whereby space needed for other purposes is taken u for such screens are only practicable with air currents of low velocity, and this low velocity is attained by making the cross-areas of the passage or chambers in which the screens are set very large.

In the present invention the filtering-diaphra m is set in the immediate vicimt of the b l owing-engine, where the velocity 0 the air is high, and preferably in the blower-case, so that the dust and a portion of the air-is blown through the said filtering-diaphragm, while the remaining portion of the air, freed from the dust, is delivered to the ducts which lead to the place of use. provided with means which catch and deposit the dust which was blown through the diaphragm and for mingling the air which was also blown therethrough after the dust is deposited with the body of air from which thedust was originall screened. The process of separating the ust from the air is there: fore the reverse of that now employed in that the dust is forced through the screen, where as in existing methods it is arrested by the screen, and the lacing of the diaplhragm,

which is preferab y a wire screen, in t e high velocity air enables a screen of small area to screen a large volume of air and dispenses with the large filtering-screens now in use, as above mentioned.

As the process of separatin the fine suspended articles has been escribed and claimed in' another of my applications forheads of said case.

The blower is also ilnited States Letters Patent, Serial No. 159,917, filed June 3, 1903, I shall hereinafter describe and claim only the apparatus,

referring to the accompanying drawings to aid the description, Figure 1 being a horizontal section and plan of my blower, and Fig. 2 a vertical section of the blower.

A is the blower-case, provided with the usual central air-inlets a. andwith the tan gential discharge 1) and containing the cent'rifugal'fan C on the shaft D, which is mounted in the usual manner in the blower-case A and is driven by pulle d from a suitable motor. The caseAispre erablysomewhatlarger diametrically than the common centrifugal blower-cases in order to afford room'for t e dust se arating or filtering screen and for the dust-co lecting chamber. Said screen E is preferably of wire mesh of suitable fineness, 1s situated adjacent to the fan-blades and where the velocity of the air is relatively high, is preferably shaped as a volute eccen trio to the volute part of the case A, as shown, being secured to said case at its inner edge e, and thence passing around and being fastened to the wall f of the discharge b. Said screen E is fixed in'case A in the desired volute shape in any suitable manner, as by bevolute flanges g g on the A dust-settling chamber H is preferabl provided outside of the screen E and is pre erably constructed, as shown,

ing fastened to the by extending the walls of the case A downwardly to forma water-chamber below the said wall f of the discharge b, and I prefer to place transverse gratings h in said chamber H to aid inarrestin the dust, said gratings projecting a little a ove and a little below the water-level. Said ratings It not only aid in catching the dust, ut also revent the excessive agitation of the water y the ragidly-moving air.. Near the front end of t e said chamber H an opening (or openings) 41 is provided into the discharge 6, w 'ch said opening 'i is provided with dampers 7' j, adjust-' able from outside the case A, whereby the delivery of the air from the chamber H into the discharge b is controlled as desired.

In operation the dust-laden air being blown at high velocity against the screen E the particles of dust and a-greater or less portoo discharge and thence to the place of use. The

dust-laden air which passed through the rated,

screen E sweeyiiIng down toward the water in the chamber the dust particles are'arrested b the gratings and caught by the wa-' ter, whi e the air, now-freed from dust, flows on and upward into the discharge through the dam ers j at a pont a little in front of the screen where it mingles with the air from Which the dust had originallybeen filtered, or, if preferred, it may be allowed to escape by an outlet N without being mingled with the air.

from whichthejdust had been originall epa- In fact, in some cases I may al ow the air which passed through the screen with the dust to escape directly into atmosphere, and

2. The combination in air-filtering appa r'atus of a blower provided with an air inlet and outlet and containing a permeable wall adapted to permit of the passage of dust particles, a dust-collecting chamber communieating with the said outlet, and .means for "controlling the communication between said chamber, and-said outlet, substantially aside- "sc'ribe'd. I

'3. Inv -air-filtering apparatus, a self-contained blower characterized by the following elements combined in one structure; an airpropelling device and a case' therefor provided with an inlet and an outlet, a permeable diaphragm in the case in the ath of high-velocity air, a dustcollecting c amber in said case outside of said-diaphragm, adapted to be put into communication with said outlet, and a receptacle for'liquid in saidchamber, substantially as described.

propellingdevioe and a case therefor provided with an inlet and an outlet, a perme- 1 able diap'hra'gm in the case in the path of the ber outside of said diaphragm adapted to be put into communication with said outlet, substantiallyas described.

high-velocity air, and adust-collecting cham- 1 5. The combination in air-filter'ng apparatu's, of a blower, a permeable adjacent to the blower and in the p of the high-velocity air, whereby the drst and part of the air is driven through said diaphragm, a

discharge from the inner side of said diaphragm for the remaining part of the air, .a

dust-collecting chamber 'on the. outside'of said diaphragm, and an orifice connecting tially as described. v

6. 'Thecombination in air-filterii1g apparatus, of a. blower, a permeable diaphragm adjacent to the blower and in the path of the high-velocity air, whereby the dust and part of the air is forced. through said diaphragm, a discharge from the inner side of said" diaphragm for the remaining part of the air, a dust-collecting chamber on the outside of said diaphragm, and an orifice provided with an adjustable valve connecting said chamber with said discharge, substantially as described. i

' "7. The combination in air-filteringfiappm r'atus, of a blow er and case therefor, a perineable diaphragm in the path of the highvelocity air, a dust-collecting. chamber outside of the said diaphragm adapted to contain a collecting liquid, and a grid to arrest the dust in said chamber, substantially as described.

Signed at New York city this23d day of May, 1903. b WILLIAM J BALDWIN. Witnesses:

DAVID WALTER BROWN, CHARLES WEIN..

said chamber with said dischargepsubstan- 

